Quantum Mechanics and General Relativity

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SUMMARY

The discussion centers on the relationship between quantum mechanics and general relativity, specifically addressing the concept of time. It is established that there is currently no universally accepted theory that successfully combines these two frameworks. While some interpretations suggest that time may not be fundamental in certain quantum gravity approaches, such as canonical quantum gravity, emergent time remains a viable explanation. The conversation emphasizes the importance of distinguishing between sensationalized media portrayals and the actual scientific discourse surrounding these theories.

PREREQUISITES
  • Understanding of quantum mechanics principles
  • Familiarity with general relativity concepts
  • Knowledge of canonical quantum gravity theories
  • Ability to differentiate between scientific theories and popular media interpretations
NEXT STEPS
  • Read "Quantum Gravity" by Carlo Rovelli for insights into canonical quantum gravity
  • Explore the concept of emergent time in quantum theories
  • Investigate current research on unifying quantum mechanics and general relativity
  • Study the implications of time in physics through resources like "The Order of Time" by Carlo Rovelli
USEFUL FOR

Physicists, students of theoretical physics, and anyone interested in the foundational aspects of time in the context of quantum mechanics and general relativity.

Zerko
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I saw that if you combine the quantum mechanics theory whit the general relativity you remain whitout time. So the time can be an ilusion, but i don't believe that . What you think about it ?
 
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Zerko said:
I saw that if you combine the quantum mechanics theory whit the general relativity you remain whitout time. So the time can be an ilusion, but i don't believe that . What you think about it ?

Welcome to PhysicsForums, Zerko!

There is no generally accepted theory which combines these two theories. There are a number of "promising" ideas being kicked around, but I would not say that time disappears in these. Is there a specific version you have questions about?

If you saw it on TV, frequently they use language to describe the quantum world which tends to be a little bit sensational. I would recommend you read up some more to gain insight, there are some good books out there!
 
In canonical quantum gravity (which is a wide class of various approaches to quantum gravity), the wave function does not depend on time. So if the wave function is all what exists, then nothing depends on time. Or more precisely, nothing depends on a FUNDAMENTAL parameter of time. Yet clocks exist, so EMERGENT time still can be explained with such theories.
 

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